Hello Team, I'm trying to make a commit to a checkpatch fix , and i have followed the instructions in the first patch tutorial but i'm not able to commit . Following were the steps done . 1)Made changes to the file 2)Run git diff command got the below output diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index 146ab00..02a41bc 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -2611,7 +2611,7 @@ static int comedi_open(struct inode *inode, struct file *file) } if (dev->attached && dev->use_count == 0) { if (!try_module_get(dev->driver->module)) { - rc = -ENOSYS; + rc = -ENODATA; goto out; } if (dev->open) { 3) when i run git commit -a i get the below message and the same goes for git commit -s -v bash-4.2$ git commit -a usage: git diff-index [-m] [--cached] [<common diff options>] <tree-ish> [<path>...] common diff options: -z output diff-raw with lines terminated with NUL. -p output patch format. -u synonym for -p. --patch-with-raw output both a patch and the diff-raw format. --stat show diffstat instead of patch. --numstat show numeric diffstat instead of patch. --patch-with-stat output a patch and prepend its diffstat. --name-only show only names of changed files. --name-status show names and status of changed files. --full-index show full object name on index lines. --abbrev=<n> abbreviate object names in diff-tree header and diff-raw. -R swap input file pairs. -B detect complete rewrites. -M detect renames. -C detect copies. --find-copies-harder try unchanged files as candidate for copy detection. -l<n> limit rename attempts up to <n> paths. -O<file> reorder diffs according to the <file>. -S<string> find filepair whose only one side contains the string. --pickaxe-all show all files diff when -S is used and hit is found. -a --text treat all files as text. i'm not able to commit the changes ,let us know what could be the problem . Below is the details of the git version git version 1.7.11.7OS : Fedora Regards, Santosh Pai